TWI764689B - Automatic control device and method for supplementing nutritive liquid - Google Patents

Abstract

The disclosure is related to an automatic control device and method for supplementing nutritive liquid. When first nutritive liquid in a bucket doesn’t meet the liquid height, a supplement signal is generated and transmitted by a liquid height detect module. When an embedded control unit receives the supplement signal, it controls a electronic gate unit to open a nutritive transmit switch, so as to transmit second nutritive liquid into the bucket. A cloud server module may store related data about the first nutritive liquid. A PH value detect module may generate a detect value by detecting PH value of the first nutritive liquid and then send the detect value to the cloud server module. A PH balance control module may supply an acidic/alkaline substance to the bucket for adjusting the PH value of the first nutritive liquid. With this control device and method thereof, the height, PH value, and electronic conductivity of the nutritive liquid will be controlled automatically.

Description

Automatic control device and method for supplementing nutrient solution

The present invention relates to an automatic control device and method thereof, in particular to a control device and method for automatically replenishing plant nutrient solution.

The known method of crop cultivation is to plant seeds in soil, allow the seeds to absorb water and air, and expose the crops to sunlight for photosynthesis to grow. In recent years, hydroponics has gradually attracted people's attention. It uses a variety of inorganic nutrients to provide the nutrients needed for crops, and it does not need to be planted through soil, allowing people to grow a large number of crops indoors. In view of this, more and more people have begun to develop large-scale hydroponic cultivation systems.

Generally speaking, the liquid culture system can use the following five components, namely 1, the growth container, 2, the nutrient solution, 3, the liquid feeding pump and pipeline, 4, the collection system, and 5, the monitoring system. The growing container is used to hold the medium, in which the roots of the crops can be grown, and there must be a system for transporting the nutrient solution into the growing container. The nutrient solution can be stored in a concentrated state in general, and when used in crops, it can be diluted with clean water to obtain an appropriate nutrient solution concentration. The liquid feeding pump and the pipeline system are used to provide a conveying route, which can evenly convey the nutrient solution to the locations where each plant is distributed. The collection system is used as a recovery system for the nutrient solution. After the growth vessel is drained, the drained nutrient solution can be sent to a recovery tank through a preset pipeline. The monitoring system can automatically adjust the concentration of the nutrient solution by means of computer monitoring, and control the frequency and action of the feeding pump according to the current situation. Generally, the state of the nutrient solution is monitored automatically. pH, conductivity and temperature are measured manually. Combining the above five components, you can get good crop growth.

However, most of the operations of the current hydroponic culture system are still performed manually, and only automatic monitoring of the state of the hydroponic solution is performed, thereby limiting the automatic development of the related industries of the hydroponic culture system. Therefore, In view of the foregoing, the inventors of the present invention have considered and designed an automatic control device for nutrient supplementation and a method thereof, in order to improve the deficiencies of the prior art, thereby promoting the implementation and utilization in the industry.

Based on the above purpose, the present invention provides an automatic control device for supplementing nutrient solution, which comprises a nutrient solution tank, a liquid height detection module, a nutrient solution addition control module, a cloud servo module, and an acid-base module. A value detection module and an acid-base balance control module. The nutrient solution bucket is used for placing the first nutrient solution. The liquid height detection module is used to detect whether the first nutrient solution in the nutrient solution tank satisfies a water level, and when not satisfied, the liquid height detection module generates and continuously sends an addition signal. The nutrient solution adding control module includes an electronic water gate unit and a raspberry pie embedded control unit. The electronic water gate unit is used to control a second nutrient solution to be delivered to a nutrient solution delivery switch of the nutrient solution tank. When the embedded control unit receives the addition signal, the embedded control unit controls the electronic water gate unit to turn on the nutrient solution delivery switch, and then deliver the second nutrient solution to the nutrient solution tank. The cloud server module is used for storing relevant data of the first nutrient solution. The pH value detection module is placed in the first nutrient solution, and is used for detecting the pH value of the first nutrient solution to generate a detected value, and periodically transmits the detected value to the cloud server module. The acid-base balance control module is used for adding acidic substances or alkaline substances to the first nutrient solution of the nutrient solution tank. The cloud servo module regularly transmits the detected value to the acid-base balance control module, and the acid-base balance control module adds the acidic substance or the alkali according to the difference between a suggested acid-base value and the detected value sexual substances.

Preferably, the liquid height detection module includes an infrared detection sensor.

Preferably, the acid-base balance control module uses a peristaltic motor to add the acidic substance or the alkaline substance.

Preferably, the automatic control device for supplementing the nutrient solution of the present invention further comprises an electrical conductivity detection module, which is used for detecting the electrical conductivity of the first nutrient solution and the second nutrient solution.

Preferably, when the electrical conductivity of the first nutrient solution and the second nutrient solution is too high, the concentrations of the first nutrient solution and the second nutrient solution are diluted. When too low, the concentrations of the first and second nutrient solutions are increased.

Based on the above object, the present invention further provides an automatic control method for supplementing nutrient solution, which is suitable for placing in a nutrient solution tank of a first nutrient solution, and includes the following steps. The liquid height detection module is used to detect whether the first nutrient solution in the nutrient solution tank meets a water level height. When the water level height is not satisfied, the liquid height detection module generates and continuously sends an addition signal. A Raspberry Pi embedded control unit controls the electronic water gate unit to open the nutrient solution delivery switch according to the added signal, and then delivers the second nutrient solution to the nutrient solution tank. A pH value detection module is used to detect a pH value of the first nutrient solution, and then a detected value is generated, and the detected value is periodically transmitted to the cloud server module, and the cloud server module is used for Relevant data of the first nutrient solution is stored. An acid-base balance control module is used to add acidic substances or alkaline substances to the first nutrient solution in the nutrient solution tank. The cloud server module periodically transmits the detected value to the acid-base balance control module, and the acid-base balance control module adds the acidic substance or the alkali according to the difference between a suggested acid-base value and the detected value sexual substances.

Preferably, the liquid height detection module includes an infrared detection sensor.

Preferably, the acid-base balance control module utilizes a peristaltic motor to add acidic substances or alkaline substances.

Preferably, the automatic control method for supplementing the nutrient solution of the present invention further comprises using a conductivity detection module to detect the electrical conductivity of the first nutrient solution and the second nutrient solution.

Preferably, when the electrical conductivity of the first nutrient solution and the second nutrient solution is too high, the concentrations of the first nutrient solution and the second nutrient solution are diluted, when the first nutrient solution and the second nutrient solution are diluted. When the conductivity of the nutrient solution is too low, the concentrations of the first nutrient solution and the second nutrient solution are increased.

In order to facilitate the examiners to understand the features, contents and advantages of the present invention, as well as the effects that can be achieved, the present invention is hereby described in detail as follows in the form of an embodiment in conjunction with the accompanying drawings. The subject matter is only for illustration and auxiliary description, and may not necessarily be the real scale and precise configuration after the implementation of the present invention. Therefore, the proportion and configuration relationship of the attached drawings should not be interpreted or limited to the scope of rights of the present invention in actual implementation.

The advantages, features, and technical means of achieving the present invention will be more easily understood by being described in more detail with reference to the exemplary embodiments and the accompanying drawings, and the present invention may be implemented in different forms, so it should not be construed as being limited to what is described herein. Rather, the embodiments are provided so that this disclosure will be thorough, complete and complete to convey the scope of the invention to those of ordinary skill in the art, and the invention will only be appended Defined by the scope of the patent application.

Please refer to Fig. 1 and Fig. 2, which are block diagrams and schematic diagrams of the automatic control device for supplementing the nutrient solution of the present invention. As shown in the figure, the automatic control device 100 for nutrient supplementation of the present invention may include a nutrient solution tank 10, a liquid height detection module 20, a nutrient solution addition control module 30, a cloud servo module 40, a The pH detection module 50 and an acid-base balance control module 60 are provided. The nutrient solution bucket 10 is used for placing the first nutrient solution 11 for the cultivation of the plant A. In another embodiment, the nutrient solution bucket 10 can also be directly used as a container for the plant A to grow.

The liquid height detection module 20 can include an infrared detection sensor, which can be erected around the nutrient solution tank 10 and used to detect whether the first nutrient solution 11 has reached a water level in the nutrient solution tank 10 height, if the detection result is no, the liquid height detection module 20 generates an addition signal 21 and continues to send the signal.

Further, the infrared detection sensor can include an infrared transmitter and an infrared receiver. When the height of the water level of the nutrient solution tank 10 is set to 5 cm, the infrared transmitter and the infrared receiver can be installed in the nutrient solution. The height of the bucket 10 is 5 cm, and a shield is set on the liquid level to block the infrared transmitter and the infrared receiver. When there is an abnormality (that is, when the water level is lowered), the infrared receiver will receive the signal from the infrared transmitter. , at this time, the addition signal 21 can be generated and sent.

The nutrient solution addition control module 30 and the nutrient solution tank 10 are connected with a pipeline for transmitting the second nutrient solution 12, and the nutrient solution addition control module 30 may include an electronic water gate unit 31 and a Raspberry Pi (Raspberry Pi). ) Embedded control unit 32, the electronic water gate unit 31 is used to control the feeding of the second nutrient solution 12 to the nutrient solution delivery switch 33 of the nutrient solution tank 10, and when the Raspberry Pi embedded control unit 32 receives this addition When the signal is 21 , it controls the electronic water gate unit 31 to turn on the nutrient solution delivery switch 33 , thereby delivering the second nutrient solution 12 into the nutrient solution tank 10 .

The characteristic of the Raspberry Pi embedded control unit 32 is that it integrates the Linux kernel and the X window, which is different from the traditional cross-compile method when developing other embedded systems. In the prior art, using the Raspberry Pi embedded control unit 32 can greatly reduce the development cost.

Through the nutrient solution addition control module 30 continuously receiving the signal of the liquid height detection module 20, and the method of adding the second nutrient solution 12 by the nutrient solution addition control module 30, the liquid level in the nutrient solution tank 10 can be adjusted. It is always maintained at a fixed height, and when the nutrient solution bucket 10 is used as a container for the growth of the plant A, the user does not need to manually add nutrient solution to the nutrient solution bucket 10, so the present invention can indeed greatly increase the number of users One of convenience.

The cloud server module 40 can be a networked computer host or a workstation, which can be used to store relevant data of the first nutrient solution 11 , such as pH, conductivity, temperature, and the like.

The pH value detection module 50 can be used to detect a pH value of the first nutrient solution 11, thereby generating a detected value 51 related to the pH value, and can periodically transmit the detected value 51 to the cloud server module 40. In a preferred embodiment, the pH detection module 50 can transmit the detection value 51 to the cloud server module 40 every second, so that the cloud server module 40 has one of the most immediate ones of the first nutrient solution 11 pH value.

The acid-base balance control module 60 can be used to add an acidic substance 61 or an alkaline substance 62 to the first nutrient solution 11 in the nutrient solution tank 10 , so as to control the pH value of the first nutrient solution 11 , wherein the acid-base balance control module 60 may further include controlling a peristaltic motor to add the acidic substance 61 or the alkaline substance 62 to the nutrient solution tank 10 .

As described above, after the pH detection module 50 transmits the detection value 51 to the cloud server module 40, the cloud server module 40 can periodically transmit the detection value 51 to the acid-base balance control module 60, The pH balance control module 60 can add acidic substances 61 or alkaline substances 62 according to the difference between a suggested pH value and the detected value 51 , wherein the suggested pH value is related to the type of plants and the climate. It can be understood that this control method can also be implemented in another embodiment, that is, the user can store the suggested pH value in the cloud server module 40, and the cloud server module 40 can determine the suggested pH value and detect it. The difference of the value 51 further transmits a control signal to the acid-base balance control module 60 to add the acidic substance 61 or the alkaline substance 62 to the nutrient solution tank 10 .

Please refer to FIG. 3 , which is a block diagram of an automatic control device for nutrient supplementation according to another embodiment of the present invention. Please refer to FIG. 1 together. In this embodiment, the automatic control device 100 for supplementing the nutrient solution may include a nutrient solution tank 10, a liquid height detection module 20, a nutrient solution addition control module 30, a cloud servo module 40, and an acid-base For the value detection module 50 , an acid-base balance control module 60 and a conductivity detection module 70 , the technical features of the main modules have been described in the above-mentioned embodiments, so they will not be repeated here.

The difference from the above embodiment is that the present embodiment includes a conductivity detection module 70 , which can be used to detect the conductivity of the first nutrient solution 11 and the second nutrient solution 12 . Further, when the electrical conductivity of the first nutrient solution 11 in the nutrient solution tank 10 is too high, it means that the concentration of the first nutrient solution 11 should be properly diluted; When the conductivity is too low, the concentration of the first nutrient solution 11 should be appropriately increased.

In addition, the electrical conductivity detected by the electrical conductivity detection module 70 can also be uploaded to the cloud server module 40 through the network, and the cloud server module 40 can perform the first nutrient solution 11 according to the electrical conductivity. and the concentration control of the second nutrient solution 12 . In a preferred embodiment, the concentration control can also be carried out in an automated manner, which can be used to increase or dilute the concentration through a concentration balance control module. The instruction is given to the concentration balance control module to adjust the concentration percentage until the conductivity detected by the conductivity detection module 70 is within the range defined by the user.

Please refer to FIG. 4 , which is a flow chart of the automatic control method for nutrient supplementation according to the present invention. As shown in the figure, the automatic control method for supplementing the nutrient solution of the present invention can be applied to a first nutrient solution placed in a nutrient solution bucket, which comprises the following steps:

Step S11 uses a liquid height detection module to detect the height of the first nutrient solution in the nutrient solution tank. When it does not meet a preset water level height, the liquid height detection module will be generated and continued. An addition signal is sent, wherein the liquid height detection module may include an infrared detection sensor.

In step S12, an electronic water gate unit is controlled by a Raspberry Pi embedded control unit to turn on a nutrient solution delivery switch, and then a second nutrient solution is delivered to the nutrient solution tank, wherein the Raspberry Pi embedded control unit can pass the network To receive the addition signal sent by the liquid height detection module, and control the electronic water gate unit according to the addition signal.

In step S13, a pH detection module is used to detect a pH value of the first nutrient solution, thereby generating a detected value, and periodically sending the detected value to a cloud server module, wherein the cloud The servo module is used to store relevant data of the first nutrient solution, such as pH value, conductivity or temperature, etc.

Step S14 uses an acid-base balance control module to add an acidic substance or an alkaline substance to the first nutrient solution of the nutrient solution tank.

In step S15, the cloud servo module controls the acid-base balance control module according to the difference between a preset pH value and the detected value, so as to determine whether to add an acidic substance or an alkaline substance, and then control the first nutrient solution One of PH value.

In the steps of this embodiment, it may further include using a conductivity detection module to detect the conductivity of the first nutrient solution and the second nutrient solution, wherein when the first nutrient solution and the second nutrient solution When the conductivity of the liquid is too high, the concentrations of the first and second nutrient solutions will be diluted, and when the conductivity of the first and second nutrient solutions is too low, the first and second nutrient solutions will be diluted. The concentration of the solution is increased, and the concentration control methods of the first nutrient solution and the second nutrient solution have been described in the above-mentioned embodiments, so they will not be repeated here.

Based on the above, it can be known that the automatic control device and method for supplementing the nutrient solution proposed by the present invention can indeed improve the problems of the prior art. The temperature monitoring and adjustment can greatly save the maintenance cost of the caregiver, and it has a great contribution to the related industries such as nutrient solution and plant care.

The above-mentioned embodiments are only to illustrate the technical ideas and characteristics of the present invention, and the purpose is to enable those who are familiar with the art to understand the content of the present invention and implement it accordingly. It should not be used to limit the patent scope of the present invention. That is, all equivalent changes or modifications made according to the spirit disclosed in the present invention should still be covered within the patent scope of the present invention.

100: Automatic control device for supplementation of nutrient solution 10: Nursing solution bucket 11: The first nutrient solution 12: The second nutrient solution 20: Liquid height detection module 21: Add signal 30: Add control module for nutrient solution 31: Electronic water gate unit 32: Raspberry Pi Embedded Control Unit 33: Nutrient delivery switch 40: Cloud Servo Module 50: pH detection module 51: Detection value 60: Acid-base balance control module 61: Acidic substances 62: Alkaline substances 70: Conductivity detection module A: Plants S11~S15: Process steps

Figure 1 is a block diagram of the automatic control device for supplementing the nutrient solution of the present invention. Fig. 2 is a schematic diagram of the automatic control device for supplementing the nutrient solution of the present invention. FIG. 3 is a block diagram of an automatic control device for supplementing nutrient solution according to another embodiment of the present invention. Fig. 4 is a flow chart of the automatic control method for supplementing the nutrient solution of the present invention.

100: Automatic control device for supplementation of nutrient solution

10: Nursing solution bucket

11: The first nutrient solution

12: The second nutrient solution

20: Liquid height detection module

21: Add signal

30: Add control module for nutrient solution

31: Electronic water gate unit

32: Raspberry Pi Embedded Control Unit

33: Nutrient delivery switch

40: Cloud Servo Module

50: pH detection module

51: Detection value

60: Acid-base balance control module

61: Acidic substances

62: Alkaline substances

Claims (10)

An automatic control device for supplementing nutrient solution, comprising: a nutrient solution bucket for placing a first nutrient solution; A liquid height detection module is used to detect whether the first nutrient solution in the nutrient solution tank satisfies a water level. When not satisfied, the liquid height detection module generates and continuously sends an addition signal ; A nutrient solution adding control module includes an electronic water gate unit and a Raspberry Pi embedded control unit, and the electronic water gate unit is used to control the delivery of a second nutrient solution to a nutrient solution delivery switch of the nutrient solution tank. When the Raspberry Pi embedded control unit receives the addition signal, the embedded control unit controls the electronic water gate unit to turn on the nutrient solution delivery switch, and then delivers the second nutrient solution into the nutrient solution tank; a cloud server module for storing the relevant data of the first nutrient solution; A pH detection module is placed in the first nutrient solution, which is used to detect a pH value of the first nutrient solution to generate a detection value, and transmit the detected value regularly to the cloud server module; and an acid-base balance control module for adding an acidic substance or an alkaline substance to the first nutrient solution in the nutrient solution tank; Wherein the cloud server module regularly transmits the detected value to the acid-base balance control module, and the acid-base balance control module adds the acidic substance or the alkaline substances. The automatic control device for nutrient supplementation according to claim 1, wherein the liquid height detection module comprises an infrared detection sensor. The automatic control device for supplementing the nutrient solution as claimed in claim 1, wherein the acid-base balance control module utilizes a peristaltic motor to add the acidic substance or the alkaline substance. The automatic control device for supplementing the nutrient solution as claimed in claim 1, further comprising an electrical conductivity detection module, which is used for detecting the electrical conductivity of the first nutrient solution and the second nutrient solution. The automatic control device for supplementing nutrient solution as claimed in claim 4, wherein when the electrical conductivity of the first nutrient solution and the second nutrient solution is too high, the concentrations of the first nutrient solution and the second nutrient solution are controlled by Dilution, when the electrical conductivity of the first nutrient solution and the second nutrient solution is too low, the concentrations of the first nutrient solution and the second nutrient solution are increased. An automatic control method for supplementing a nutrient solution, which is suitable for placing a first nutrient solution in a nutrient solution bucket, which comprises: A liquid height detection module is used to detect whether the first nutrient solution meets a water level height in the nutrient solution tank, wherein when the water level height is not satisfied, the liquid height detection module generates and continuously sends a add signal; A Raspberry Pi embedded control unit controls an electronic water gate unit to open a nutrient solution delivery switch according to the added signal, and then delivers a second nutrient solution into the nutrient solution tank; A pH value detection module is used to detect a pH value of the first nutrient solution, thereby generating a detected value, and periodically sending the detected value to a cloud server module, wherein the cloud server module The group is used to store the relevant data of the first nutrient solution; Using an acid-base balance control module to add an acidic substance or an alkaline substance to the first nutrient solution in the nutrient solution tank; The cloud server module regularly transmits the detected value to the acid-base balance control module, and the acid-base balance control module adds the acidic substance or the alkaline substances. The automatic control method for nutrient supplementation according to claim 6, wherein the liquid height detection module comprises an infrared detection sensor. The automatic control method for nutrient supplementation according to claim 6, wherein the acid-base balance control module utilizes a peristaltic motor to add the acidic substance or the alkaline substance. The automatic control method for supplementing nutrient solution as claimed in claim 6, further comprising: A conductivity detection module is used for detecting the conductivity of the first nutrient solution and the second nutrient solution. The automatic control method for supplementing nutrient solution as claimed in claim 6, wherein when the electrical conductivity of the first nutrient solution and the second nutrient solution is too high, the concentrations of the first nutrient solution and the second nutrient solution are controlled by Dilution, when the electrical conductivity of the first nutrient solution and the second nutrient solution is too low, the concentrations of the first nutrient solution and the second nutrient solution are increased.

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